I have an Original Issue Lionel 6464-325 Baltimore and Ohio Sentinel Boxcar with the Original Box. I got it out of storage today with an eye toward selling it and I noticed something on the box I had never noticed before. On the outside flaps, it has the correct numbering, 6464-325, but on the inner flap the printed number is 6464-335. I was wondering if any of you Lionel Experts could shed any light on this. Just Curious.

The -335 is the part number for the box most likely.